E cigarettes cause lung cancer in mice, finds first study tying vaping to cancer E Cigarettes Promote Macrophage Tumor Cells Crosstalk: Focus on Breast Carcinoma Progression and Lung Metastasis Smoking has long been known as a major cause of lung cancer, but now, even vapes and e cigarettes are contributing to the risk. This World Lung Day, let's raise awareness and make E Cigarette or Vaping Associated Lung Injury New England Journal of Medicine